Pump out your septic tank every 3-5 years, or as needed based on your tank size.
Do not flush the following: Grease, Trash, Feminine Products, Cat Litter, Coffee Grounds, Cigarette butts, Bleach, Motor oil, Cleaners, Pesticides, Diapers, Toys, Household Chemicals, Wet-strength paper towels / wipes. (In other words only septic friendly toilet paper, and bodily wastes)
Repair or replace leaky fixtures. These can add water to the drain field, so replacing or repairing them will reduce the amount of water the soil has to absorb.
Maintain a proper cover of grasses or other vegetation over the drain field. Be sure to direct downspouts away from the drain field.
Do not build or drive over any part of your septic system.